Linus is one of my favorite boy names - I would use it in a heartbeat. The only association I was aware of was the Peanuts character, which I always thought was very cute/sweet. This HumphreyBogart business just sweetens the pot!

I picture a Linus to be adorable, a bit geeky, a bit quirky. Cheerful, effervescent, smart.

I just realized that I never responded to the posts on this thread! Thank you all for the feedback. I'm glad to see that most of you find Linus usable. I see it as one of those sweet spot names -- familiar enough to not be weird or unpronounceable but rare enough to stand out and be special.